Means for driving the pumps of internal-combustion engines.



H. T. BRUNS. MEANS FOR DRIVING THE PUMPS OF INTERNAL COMBUSTION ENGINES.

, APPLICATION FILED JAN.24,1911.

Patented Apr, 16, 1912.

sea s PATENT OFFICE.

' .HANS TI-I BRUNS, F NUREMIBERG, GERMANY.

DRIVING THE'PUMPS OF INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent. Patented Apr. 16, 1912. Application filed January 24, 1911. Serial No. 604,494.

To all wkom itmay concern:

Be it known that I, HANS TH BnUNs, a

' subject of the King of Prussia, residing at Nuremberg, in the Kingdom of Bavaria and German EmpK-e, have invented an Improved Means for Driving the Pumps of Internal-Combustion- Engines, of which the following is a specification.

This invention relates to an improved means for driving the pumps of internal combustion engines and has for its object to make such engines of compact construction and also silent when in operation; thisobject is-attained in a simple manner by em ploying a single element suchas a double bell-crank lever for transmitting the movements of an oscillating body which also moves in the longitudinal direction to a rod so as to reciprocate the same. 1nvent1on is intended to solve this problem The present in a manner so that all the auxiliary pumps of an internal combustion engine aredriven by means of a single eccentric, or equivalent means from the driving shaft of the motor.

It is known that a compact construction of motors of the kind in question is of great advantage for the purposes for which these engines are employed. In no other type of engine are chattering or lengthy connections.

or connections comprising a number of joints so prejudicial as in internal-combustion engines of this kind which run at an eX- ceedingly high speed. From this point of view the invention is advantageous in two ways: firstly the reduction in the space 00- cupied by the auxiliary pumps as a whole constitutes an advance In the art, and secondly driving them by means of a single ec centric from the main shaft in employing relatively short, simply-jointed transmission means such as traction and pressure rods-or cam shafts, must be regarded as an important development of the engine as regards the utilization of space and improvement in the method of operation.

The invention is capable of embodiment in numerous ways. The idea 'of incorporating the compact construction and connection of the lubricating oil pumps with the cooling water pump and the fuel pump, which conducts the fuel from the tank reservoir or the like to the fuel pump proper, is common. to all these embodiments. This fuel pump is here designated the supplv pump in contra-distinction to the fuel-pump proper pump is mounted-in the vertical shaft plane above the shaft, the.cooling water pump bewhich is hereinafter referred to; then again in all the embodiments of which the invention is capable the said three pumps are fitted to an eccentric or the like on the crank shaft, in such a manner that each rotation of the eccentric produces a stroke in each of the three pumps. This positive drive of the three pumps by means of an eccentric is possible owing to the fact that the lubricating ing arranged laterally thereof and the feed pump on the other side. The three pumps are thus located side by side in a plane which is vertical to the crank shaft.

The essential feature of my invention resides in the positive'coupling of the fuel pump or pumps proper with the pump gear and in accordance with the present invention this result is attained by extending the connection of the driving eccentric with the piston of the lubricating oil pump beyond the end of the piston, this extension beingpositively coupledby means of suitable intermediate parts such as a double bell-crank lever connection with the piston or pistons of the fuel pump or pumps proper. In order to embody this idea in practice it was necessary to solve the problem of converting the movements of an oscillating body which was simultaneously reciprocated longitudinally into a simple movement of the latter kind.

This problem has been solvedby employing simple means which are as follows The connecting rod of the lubricating pump which is extended beyond the point-of it's engagement with the pump piston is connected by means of a slot connection with a rocking shaft, which is coupled in the man ner of a double bell crank lever by a cross-v head beam or the like with the piston or pistons of the fuel pump. By such an arrangement the circular or elliptical movement of the end of the connecting rod of the lubricating pump'which is guided in the slotis converted into a simple angular or rocking movement of the rocking shaft and this rocking movement is converted by the crosshead beam double bell crank lever) into a reciprocating horizontal or vertical move ment of the piston or pistons of the fuel pumps.

An embodiment of the invention in connection with a two-cylinder motor is diagrammatically illustrated in side elevation in the accompanying drawing in which five pumps 2'. 0., the lubricating oil pump, the cooling water pump, the feed pump and two fuel pumps .are driven from the crank shaft. of the motor by the intermediary of an eccentric and the above mentioned transmission members.

The parts of the motor that have no direct relation to the invention are not shown in the drawing for clearness sake.

As illustrated in this drawing. the eccentric b is mounted on the crank shaft (I, and the connecting rod '0 of the lubricating pump, the connecting rod (Z of the cooling pump and the connecting rod e of the feed pump are pivoted to its strap. .\t f the rod 0 is fitted to the piston f of the lubricating pu'mp beyond which it is extended. The piston is of a larger diameter in its lower part and of a smaller diameter in its upper part, the annular step f formed between the two parts being the active piston face. The rod extension 0 is fitted by means of a slot connection with the lever h of the auxiliary shaft 71 which carries a cross member in the form of two arms 7c the ball heads of which are supported in such a manner as to be capable of rotation and axial displace ment in the step bearings Z Z of the piston rods 7' j of the two'fuel pumps.

At each revolution of the crank shaft a each of the five pumps is .given a full stroke. The pistons of the three lower pumps are driven directly from the eccentric b by means of their rods 0 d 6 while the fuel pumps are indirectly driven from the eccentric b by the intermediary of the prolonged lubricat ing pump connecting rod f. T he end of the rod extension 0 is given a movement with a circular or elliptical path in the slot g, the

slotted lever it thus in'iparting to the auxil iary shaft 2' a movement of rotation which is transmitted by the arms Ir 7a and the rods 7' j to the pistons m m of the fuel pumps in the direction of the stroke of the piston.

Without departure from the principle of thefitnvention the eccentric b may be replaced by git crank or the like and, instead of simply coupling the connecting rods, any other appropriate form of connection may be employed. The essential point is that the pistons of the auxiliary pumps should operate synchronously being driven simultaneously from the crank shaft by the intermerod extension with the diary of one element. such as an eccentric, crank or the like. i

I claim:-

1. In an internal combustion engine, a lubricating pump, and fuel pumps therefor. a piston for eachof said pumps, means comprising a single member, tric, crank or the like, operative with a rotary part of the engine, a rod in connection therewith for actuating the piston of the lubricating pump, an extension of said rod beyond its point of engagement with said pump piston, and means, such as a double bell-crank lever, for positively coupling said rod extension with the piston rods of said fuel pumps.

2. In an internal combustion engine, a lubricating pump, and fuel pumps therefor, a piston for each of said pumps, means comprising a single member, such as an eccentric, crank or the like, operative with a rotary part of the engine, a rod in connection therewith for actuating the/piston of the lubricating pump, an extension of said rod beyond its point of engagement with said pump piston, means, such as a double bellcrank lever, for positively coupling said rod extension with the piston rods of said fuel pumps, and a slot connection,p ositively connecting the said coupling means with the said extension. 7 l

3. In an internal combustion engine. a lubricating pump, and fuel pumps therefor, a piston for each of said pumps, means comprising a single member, such as an eccentric, crank or the like, operative with a rotary part of the engine, a; rod in connection therewith for actuating the piston of the lubricating pump, an extension of said rod beyondits point of engagement with said pump piston, means, such as a doubldbellcranlr lever, for positively coupling said piston rods of said fuel pumps, a rocking shaft, supporting the said coupling means, and a slot connection operatively connecting said coupling means with the said extension.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HANS TH BRUNS.

\Vitnesses: 4

RALPH N. Dox, ELISABETH HELLMUTII.

such as an eccen- 

